package com.huixue.cn.ztej.weixin.util;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;
import java.util.Calendar;
import java.util.Date;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.servlet.http.HttpServletRequest;

import net.sf.json.JSONException;
import net.sf.json.JSONObject;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpRequest;

import com.huixue.cn.ztej.constants.Constant;
import com.huixue.cn.ztej.utils.HashMapUtil;
import com.huixue.cn.ztej.utils.Urls;
import com.huixue.cn.ztej.weixin.bean.AccessToken;
import com.huixue.cn.ztej.weixin.bean.OAuthInfo;
import com.huixue.cn.ztej.weixin.bean.XiaoOAuthInfo;
import com.huixue.cn.ztej.weixin.menu.Menu;


public class WeixinUtil {
	
	private static Logger log = LoggerFactory.getLogger(WeixinUtil.class);
	// 获取access_token的接口地址（GET） 限200（次/天）
	public final static String access_token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";

	// 菜单创建（POST） 限100（次/天）
	public static String menu_create_url = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=ACCESS_TOKEN";
	
	//微信消息推送
	public static String message_push_url = "https://api.weixin.qq.com/cgi-bin/message/wxopen/template/send?access_token=ACCESS_TOKEN";

	/**
	 * 创建菜单
	 * 
	 * @param menu
	 *            菜单实例
	 * @param accessToken
	 *            有效的access_token
	 * @return 0表示成功，其他值表示失败
	 */
	public static int createMenu(Menu menu, String accessToken) {
		int result = 0;
		// 拼装创建菜单的url
		String url = menu_create_url.replace("ACCESS_TOKEN", accessToken);
		//String url = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token="+accessToken;
		// 将菜单对象转换成json字符串
		String jsonMenu = JSONObject.fromObject(menu).toString();
		// 调用接口创建菜单
		JSONObject jsonObject = httpRequest(url, "POST", jsonMenu);
		
		if (null != jsonObject) {
			if (0 != jsonObject.getInt("errcode")) {
				result = jsonObject.getInt("errcode");
				log.error("创建菜单失败 errcode:{} errmsg:{}",jsonObject.getInt("errcode"),jsonObject.getString("errmsg"));	
			}
		}

		return result;
	}

	/**
	 * 获取access_token
	 * 
	 * @param appid
	 *            凭证
	 * @param appsecret
	 *            密钥
	 * @return
	 */
	public static AccessToken getAccessTokenFromWX(String appid, String appsecret) {
		AccessToken accessToken = null;

		String requestUrl = access_token_url.replace("APPID", appid).replace(
				"APPSECRET", appsecret);
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		// 如果请求成功
		if (null != jsonObject) {
			try {
				accessToken = new AccessToken();
				accessToken.setToken(jsonObject.getString("access_token"));
				accessToken.setExpiresIn(jsonObject.getInt("expires_in"));
			} catch (JSONException e) {
				accessToken = null;
				// 获取token失败
				log.error("获取token失败 errcode:{} errmsg:{}",jsonObject.getInt("errcode"),jsonObject.getString("errmsg"));	
			}
		}
		return accessToken;
	}

	/**
	 * 描述: 发起https请求并获取结果
	 * 
	 * @param requestUrl
	 *            请求地址
	 * @param requestMethod
	 *            请求方式（GET、POST）
	 * @param outputStr
	 *            提交的数据
	 * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
	 */
	public static JSONObject httpRequest(String requestUrl,
			String requestMethod, String outputStr) {
		JSONObject jsonObject = null;
		StringBuffer buffer = new StringBuffer();
		try {

			// 创建SSLContext对象，并使用我们指定的信任管理器初始化
			TrustManager[] tm = { new MyX509TrustManager() };
			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			// 从上述SSLContext对象中得到SSLSocketFactory对象
			SSLSocketFactory ssf = sslContext.getSocketFactory();

			URL url = new URL(requestUrl);
			HttpsURLConnection httpUrlConn = (HttpsURLConnection) url
					.openConnection();
			httpUrlConn.setSSLSocketFactory(ssf);

			httpUrlConn.setDoOutput(true);
			httpUrlConn.setDoInput(true);
			httpUrlConn.setUseCaches(false);

			// 设置请求方式（GET/POST）
			httpUrlConn.setRequestMethod(requestMethod);

			if ("GET".equalsIgnoreCase(requestMethod))
				httpUrlConn.connect();

			// 当有数据需要提交时
			if (null != outputStr) {
				OutputStream outputStream = httpUrlConn.getOutputStream();
				// 注意编码格式，防止中文乱码
				outputStream.write(outputStr.getBytes("UTF-8"));
				outputStream.close();
			}

			// 将返回的输入流转换成字符串
			InputStream inputStream = httpUrlConn.getInputStream();
			InputStreamReader inputStreamReader = new InputStreamReader(
					inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(
					inputStreamReader);

			String str = null;
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			bufferedReader.close();
			inputStreamReader.close();
			// 释放资源
			inputStream.close();
			inputStream = null;
			httpUrlConn.disconnect();
			jsonObject = JSONObject.fromObject(buffer.toString());
		} catch (ConnectException ce) {
			log.error("Weixin server connection timed out.");
		} catch (Exception e) {
			log.error("https request error:{}", e);
		}
		return jsonObject;
	}
	
	
	public static String getAccessToken(String appid, String appsecret) {
	       String accessToken = "";
	       AccessToken token = new AccessToken();
	       if (HashMapUtil.tokenMap.size() > 0) {
	           	  token = HashMapUtil.tokenMap.get("access_token");
	              // 当前时间
	              Calendar nowTime = Calendar.getInstance();
	              nowTime.setTime(new Date());
	              // 通用接口凭证申请时间加过期时间
	              // 特殊处理：过期时间减60秒
	              Calendar applyTime = Calendar.getInstance();
	              applyTime.setTime(token.getApplyTime());
	              applyTime.add(Calendar.SECOND, token.getExpiresIn() - 300);
	              // 比较时间
	              if (nowTime.compareTo(applyTime) >= 0) {
	                  // Token失效,删除内存中的数据
	                  HashMapUtil.tokenMap.remove("access_token");
	                  token=getAccessTokenFromWX(appid,appsecret);
	                  token.setApplyTime(new Date());
	                  HashMapUtil.tokenMap.put("access_token",token);
	                  accessToken = token.getToken();
	              } else {
	                  // Token有效
	                  accessToken = token.getToken();
	              }
	          }else{
	              token=getAccessTokenFromWX(appid,appsecret);
	              token.setApplyTime(new Date());
	              HashMapUtil.tokenMap.put("access_token",token);
	              accessToken = token.getToken();
	          }
	       
	   return accessToken;  
	} 
	
	/**
	 * 
	 * @param appid
	 * @param secret
	 * @param code
	 * @param request
	 * @return
	 */
    public static OAuthInfo getOAuthOpenId(String appid, String secret, String code,HttpServletRequest request ) {
        OAuthInfo oAuthInfo = null;
        String o_auth_openid_url = Urls.URL_OAUTH_OPENID;
        String requestUrl = o_auth_openid_url.replace("APPID", appid).replace("SECRET", secret).replace("CODE", code);
        JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
        //oAuthInfo是作者自己把那几个属性参数写在一个类里面了。
        // 如果请求成功
        if (null != jsonObject) {
            try {
                oAuthInfo = new OAuthInfo();
                oAuthInfo.setAccessToken(jsonObject.getString("access_token"));
                oAuthInfo.setExpiresIn(jsonObject.getInt("expires_in"));
                oAuthInfo.setOpenId(jsonObject.getString("openid"));
                oAuthInfo.setScope(jsonObject.getString("scope"));
            } catch (JSONException e) {
                oAuthInfo = null;
                // 获取token失败
                log.error("网页授权获取openId失败 errcode:{} errmsg:{}", jsonObject
                        .getInt("errcode"), jsonObject.getString("errmsg"));
                
                if(request.getSession().getAttribute("aouAuthInfo")!=null){
                	oAuthInfo = (OAuthInfo)(request.getSession().getAttribute("aouAuthInfo"));
        		}
            }finally{
            	
            }
        }
        return oAuthInfo;
    }
    
    /**
     * 获取小程序OpenID
     */
    public static XiaoOAuthInfo getXiaochengxuOAuthOpenId(String appid, String secret, 
    		String code,HttpServletRequest request ) {
    	XiaoOAuthInfo oAuthInfo = null;
    	String o_auth_openid_url = Urls.URL_XCX_OAUTH_OPENID;
    	//System.out.println("======Urls.URL_XCX_OAUTH_OPENID========="+Urls.URL_XCX_OAUTH_OPENID);
    	//log.error("o_auth_openid_url", o_auth_openid_url);
    	//System.out.println("======o_auth_openid_url========="+o_auth_openid_url);
    	//log.error("appid", appid);
    	//System.out.println("======appid========="+appid);
    	//log.error("secret", secret);
    	//log.error("code", code);
    	String requestUrl = o_auth_openid_url.replace("APPID", appid).replace("SECRET", secret).replace("CODE", code);
    	
    	//System.out.println("======requestUrl========="+requestUrl);
    	//log.error("requestUrl=222", "============="+requestUrl+"===============");
    	JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
    	//System.out.println("========jsonObject======="+jsonObject.toString());
    	if(null != jsonObject){    		
    		try {
                oAuthInfo = new XiaoOAuthInfo();
                oAuthInfo.setSession_key(jsonObject.getString("session_key"));
                if(jsonObject.containsKey("expires_in")){
                	oAuthInfo.setExpires_in(jsonObject.getString("expires_in"));
                }
                oAuthInfo.setOpenid(jsonObject.getString("openid"));
            } catch (JSONException e) {
                oAuthInfo = null;
                // 获取token失败
                log.error("网页授权获取openId失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));
                /*if(request.getSession().getAttribute("aouAuthInfo")!=null){
                	oAuthInfo = (OAuthInfo)(request.getSession().getAttribute("aouAuthInfo"));
        		}*/
            }finally{
            }
    	}
    	
    	return oAuthInfo;
    }
    
    
    /**
     * 消息推送
     * @param json
     * @param accessToken
     * @return
     */
    public static JSONObject pushMessage(String json,String accessToken){
    	String requestUrl = message_push_url.replace("ACCESS_TOKEN", accessToken);
    	JSONObject jsonObject = httpRequest(requestUrl, "POST", json);
    	return jsonObject;
    }
	  
    
}
